Gas-engine.



B. E. HALVERSTADT.

. GAS ENGINE.

APPLIOATIOH FILED we. 23,1907. RENEWED SEPT. 7, 1909.

Patented 0ct.12,1909.

2 SHEETS-SHEET 1.

INVENTOR 7 aw M WuTME-EE-EE ATTORNEY B. E. HALVERSTADT.

(ms ENGINE. I j APPLIOATIGN FILED AUG. 23, 1907. RENEWED SEPT. 7, 1909.

936,3 1 8 Patented Oct. 12, 1909. I 2 SHEETS-B INVEN GkS-ENGINE.

Agplication filed iiiigust 23, 1907, Serial 1%. 32mm.

To all whom it may concern: v

Be it known that I, BERTRAM I {KATHER- s'rlio'r, a citizen of the Unitedrersiding at Lectonizi, Cohinihieiio county, State of Ohio, haveinvented or discovered new and useful 1m rovements in ijrue-l lngines,of which the following o specification.

My invention relates to gas engines and consists in providing meanswhereby the valves and the igiiit. r are operated at the firstrevolution of the crank shaft; after the governor has released the valveand. ignilor controllers or has assumedv the position whereby gas may heagain supplied. to the cylinder.

Heretofore, it has been common to orrange the control of the valves andthe niter so that the valve shaft, which mikes one revolution While thecrank-slm't't 11m kes two revolutions, will operate the valves and theignite at every revolution of the valve shaft, or at every otherrevolutionof the engine shaft. t is apparent that, in such a method ofregulation, the speed of the 611-- giiie will materially decrease afterthe goverlror has operated to permitthegzis to he 's ipplied to thecylinder. due to the feet that the engine'ims to nhike two lCVOlHiiOIlSafter the governor has; operated, as described, before mother explosioncan take place. With my ll1\l3lll'l()ll,'l1llll one revolw tion at mostof the crank shaft is required after the governor has set free thedevices for supplying gee hei'or another explosion can occur. By myinvention. therefore, ihe

' regulation is more perfect and the weight of the iiy-Wheel may he grea1 reduced.

ieirrring to the drawings, Figure 1 is a side elevation of a portion ofa gas engine embodyingmy invention; .Fig. 2 an end View, portly brokenaway; F 1g. 3, a View similar to Fig. 1, the parts beirg in a differentposition; end Fig. 4, an end view of the parts in the some p0 ion, partsbeing in section and broken :1, y.

On the drznviiigs, 1 represents the cylinder of my gas engine; 2, theexhz'uist valve; 3, the inlet valve; and it. the igiiiter arm, thedetails of the latter beingemitted as they are Well kiiowir' 4 1 thepiston rod and 5, t u Iiw' shaft, the letter he vulve 0pm} 1 M beingdriven iii any :iesireo new; r from the former. that the \h izi'l tshell rotate. he imuuh hm once re crank shaft rot: s twice.

Specification of Letters Extent.

i l l t i Patented 5 Renewed September 7, 1909.

(i represents; lever pivoted below the cylinder, our end in mgpivoi'ziliy wt to the exhaust vziivv .2. whi h by the iapiiiigj lir h.he animated h lever omice stem 8 h branches f:

forwardly to it Position under i11 Mei-n; and is provided withtl'ie-ixolh-i' which may ooiiperate with either, of the come .12 or 1-3,:is-will he e:-:plaine l. The hrnilch 1i) carries the lever 91, havingpivoted thereto at one. end. the stem and -4 the valve 0 at the otherend the roller 23. which may operate With either the cams :iod will bepresently exphiinmil. "lhc valve 3 seated by the spring as n as thelever 21 i9: free to yield. The come i end 1'? are :irrniiig'ed. toengagewilh zlxe love" 4' and lift the some and thereby cause an electricspark iv :2 manner wi l] liiic vi i 25 is a. rock shaft operated bygovernor liereiiizii'ter to he th-ecriheil. 3 shaft has secured theretothe pendent arm :26, which when swung to the from of F 3 inay have itslOWU-l' end thrown on top of the rigid pin 27 secured in the branch 18of the-lever 6., when the com 12 or 13 has lowered the forward end orthe lever. {he

pin 28 in the end of the arm 25; to engage the sidool": the pin 27. 11also carries opposite the cams 13, the came 29 and 30, whi h hareincline running diagonally or the axis of the sleeve, the incline on the(EH11 on the brunch lower is locked by the arn1 26. the cams 29 and 30will cause the sleeve 11 and all the cams thereon to reciprocatebranches carry rollers 34 and 35 arranged to be engaged by the cams 29and 36 at each revolution of the sleeve, when the lever 6 This action ofback and forth every full revolution. As the inclines 31 are between thecams 12 and 13, the reciprocatrions take place when the cams arehorizontal and therefore out of engagement with the roller 20, and thereis no obstruction to prevent the sleeve moving longitudmally whenevereither of the 111- clines 31 rides against either of the rollers 35% orThe inclines 31 are of such a length that either the cam 12 is thrownabove the roller 20 or the cam 13 is thrown above the same.

The camslel and 15 are shifted as the sleeve rec'iprocates so as tofirst present one above the roller 23 and then the other. The cams 16and 17 as they reciprocate will be 111 position to operate the igniterlever 4' at any half revolution after the arm 26 releases the lever 6.

The shaft 5 carries the bevel gear 36,

meshing with the bevel gear 37 on the gov- 5 occurs and ernor shaft 38,carrying the arms 39 of the centrifugal governor 40 of a wellknown type.The arms 39 are connected by the links 41 to the sleeve 42 slidable onbut rotary with the shaft 38. The rock-shaft 25 is provided with theforked arm 43 pivoted to the pins 41 on the collar 45 on the sleeve,this collar being in a groove (see Fig. 2) in the sleeve, so that thecollar may follow the rcciprocations of the sleeve but cannot rotatewith it. i

If the partsare as in Figs. 1 and 2, the cam 13, being in en agementwith the roller 20, has caused the ever 6 to be rocked so as to open theexhaust valve 2. As the cam 13 passes from. the roller 20, the valve 2closes. following this the cam 15 actuates the lever 21 so as to openthe inlet valve .3. The cam- 15 then releases the'levcr 21 and thespring 22 closes the valve 3. Toward the close of the compressionstroke, the cam 17 actuates the igniter lever 4. Then the explosion ofthe gases the working stroke takes place. These steps are repeated untilthe s ed of the engine is so great as to cause t e governor to rock theshaft 25 and bring the lower end of the arm 26 over the in 27.

This locks the exhaust valve open an holds.

the outlines of the cams which-happen to be in their planes at theparticular instant of the release of the pin 27.. The sleeve 11 does notreciprocate while the arm 26 is inactive because one of the cams 29 and30 passes under one of the rollers 3 1 and 35 while they are in theirraised position; it is only when the rollers 34 and 35 are lowered andthe cams 29 and 30 are passing between them that the reciprocation takesplace. It is thus seen that,-by making the cams in'pairs and causingthem alternately to come into position for actuating the valves, I haveprovided a means whereby, as soon as the governor acts'to release the in27, the gas is exploded as early as the first revolution of the engine.2

The-first suction-stroke of the en ine after the governor permit@ theinlet valve to be opened, that is, after'the engine speed falls below apredetermined rate, fills. the cylinder with explosive gases in thewell-known manner. w

I make tlie cams 12 and 13 with grooves so as to guide or keep' the cam'30 and the sleeve in proper relative positions, but other means may beused for the purpose. v

I do not wish to limit myself in the precise elements and combinationsshown and described, all it is apparent that various other means couldbe user and operate the valves, or to provide means of admitting gas onthe part revolution of the engine.

' I claim 1. In a gas engine, a gas inlet valve, means preventing theopening thereof when the speed of the engine reaches a predeterminedrate, and mechanical means for opening the said valve-for anysuction-stroke provided the speed of the engine has dropped below saidrate.

2. In a gas engine, a gas inlet valve and an ignition device, means forpreventin the opening of the valve whenthe speed 0 the engine reaches aredetermined rate, and mechanical means or opening the said valve andactuating the ignition device in series at the next suction-stroke ofthe engine after the speed thereof falls below said rate.

to reciprocate the sleeve 3. In a gasengine, a gas inlet valve, a

vice upon the reduction of the engine speed,

below said predetermined rate.

4. In a gas engine, an exhaust valve, means-fol" looking it open whilethe'speed of the en 'ine is at or above a predetermined rate, ant meansindependent of the gas pressure for releasing the locking means for anysuction-stroke provided the speed of the engine has dropped below saidrate.

5. In a gas engine, a gas inlet valve, a plurality of speed cams foractuating the same, means for making the said cams inoperative toactuate the valve, and means for causing the cams to be alternatively inposition to operate the valve when released.

6. In a gas engine, a gas inlet valve, a pair of spaced cams foractuatingthe same, means for bringing the cams alternatively in positionto operate the valve, means for preventing the valve from actuation bysaid cams and for releasing said preventin means so that the cam inposition aforesaid may actuate the valve.

7. In a gas engine, a rotary cam shaft, a sleeve rotatable with butslidable 011 the shaft and carrying a pair of oppositely placed butstaggered cams, a gas valve adapted to be actuated by the cams, meansfor preventing the cams from actuating the valve, and means for causingthe sleeve to rec1procate during such prevent-mg operation, so that thecams shall be alternatively the speed of the engine, and means forreciprocating the cams to continue the operation of the engine at thefirst revolution after the action of the governing means.

10. In a gas engine, a cam-shaft, a sleeve on the cam-shaft carryingcams, a speed governing device, and means for sliding the cams on theshaftto continue the operation of the engine at the first revolutionafter the action of the governing means.

11. In a gas engine, a cam shaft, double cams thereon olf-set from eachother, gas

valves operated by said cams, means for reciprocating the camsalternately at each half revolution of the crank shaft whenever theengine exceeds a predetermined speed, and means for making the camsinoperative until the engine speed has been reduced to saidpredetermined speed. i

12; In a gas engine, a reciprocable sleeve, off-set cams thereon, a gasvalve, a valve operating element engageable by one or the other of saidcams according to the position of the same, means for preventing thecams from engaging said element when the speed of the engine reaches apredetermined value, and means for reciprocating the sleeve so as tobring the cams consecutively in the plane of. the valve-operatingelement so thatfwhen the speed of the engine falls to said predeterminedvalue, the first cam to be in the said plane will actuate the saidelement.

Signed at Leetonia, Ohio, this 16 day of August 1907.

BERTRAIVL E. IIALVERSTA'DT.

Witnesses JOHN R. ARNOLD, A. Z. BALLANTYNE.

